الفهرس 
Title : Pathological effects of the root-knot nematode meloidogyny spp on sugarbeet and its control in Nubarya
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Abstract
Restrictions on the use of chemical nematicides in Egypt have increased, hence it needed to discover new control methods for managing root- knot nematodes. Therefore, establishing alternative control programed to combat root- knot nematode in sugarbeet in Egypt remarkably is significant. In this study, evaluation some sugarbeet varieties for their susceptibility/ resistance, nematicidal activity of some aromatic and medicinal plant amount and split nitrogen fertilizer, irrigation system, deficit irrigation water and nematicidal activity of commercial bioproducts against root- knot nematode M. incognita and on sugarbeet productivity was investigated as alternative control methods in comparison with chemical nematicides: The obtained results can be summarized as follow: The results revealed that the two sugarbeet varieties, Sible and Heba were as tolerant host. The water extracts of Demssisa, Camphor lemon and Thyme plants were the highly toxic against J2s and egg hatching. Also, the leaves powders of Demssisa, Camphor lemon (at the dosage rates of 10 or 15 g/ 1 Kg soil) and Thyme (at the rate of 15 g/ 1 Kg soil) gave pronounced nematode elimination and sugarbeet productivity promotion